/* 精灵图裁剪工具样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'M PLUS Rounded 1c', sans-serif;
  background: #0d1b2a;
  color: #e0e0e0;
  min-height: 100vh;
}

/* 顶部标题栏 */
.header {
  display: flex;
  align-items: center;
  padding: 12px 20px;
  background: rgba(30, 41, 59, 0.95);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-back {
  color: #667eea;
  text-decoration: none;
  font-size: 14px;
  padding: 4px 12px;
  border-radius: 6px;
  background: rgba(102, 126, 234, 0.1);
  transition: all 0.2s;
}

.btn-back:hover {
  background: rgba(102, 126, 234, 0.2);
}

.header h1 {
  font-size: 18px;
  font-weight: 500;
}

/* 主内容区 */
.main-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* 上传区 */
.upload-area {
  border: 2px dashed rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  padding: 40px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.upload-area:hover,
.upload-area.dragover {
  border-color: #667eea;
  background: rgba(102, 126, 234, 0.1);
}

.upload-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.upload-icon {
  font-size: 48px;
}

.upload-hint {
  font-size: 12px;
  color: #888;
}

.upload-preview {
  max-width: 100%;
  max-height: 300px;
  border-radius: 8px;
}

/* 设置面板 */
.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
  background: rgba(30, 41, 59, 0.8);
  padding: 16px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.setting-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.setting-group label {
  font-size: 12px;
  color: #aaa;
}

.setting-group input {
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 6px;
  padding: 6px 10px;
  color: #e0e0e0;
  font-size: 14px;
  width: 100%;
}

.setting-group input:focus {
  outline: none;
  border-color: #667eea;
}

.setting-full-width {
  grid-column: 1 / -1;
}

.radio-group {
  display: flex;
  gap: 16px;
}

.radio-label {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.2s;
}

.radio-label:hover {
  border-color: #667eea;
}

.radio-label input[type="radio"] {
  accent-color: #667eea;
  margin: 0;
}

.radio-text {
  font-size: 13px;
  color: #ccc;
}

.image-info {
  font-size: 12px;
  color: #888;
  margin-top: 8px;
}

/* 画布区域 */
.canvas-container {
  background: rgba(30, 41, 59, 0.8);
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 16px;
  overflow: auto;
  max-height: 600px;
}

#sprite-canvas {
  display: block;
  margin: 0 auto;
  cursor: crosshair;
}

/* 预览和分配区 */
.preview-section {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 20px;
}

.preview-panel {
  background: rgba(30, 41, 59, 0.8);
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 16px;
  text-align: center;
}

.preview-panel h3 {
  font-size: 14px;
  margin-bottom: 12px;
  color: #667eea;
}

.preview-info {
  font-size: 12px;
  color: #888;
  margin-bottom: 12px;
}

#preview-canvas {
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  background: #1a1a2e;
  image-rendering: pixelated;
}

.assignment-panel {
  background: rgba(30, 41, 59, 0.8);
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 16px;
}

.assignment-panel h3 {
  font-size: 14px;
  margin-bottom: 8px;
  color: #667eea;
}

.assignment-hint {
  font-size: 12px;
  color: #888;
  margin-bottom: 16px;
}

.assignment-slots {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.slot-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.slot-group-label {
  font-size: 13px;
  font-weight: 500;
  min-width: 60px;
  color: #ccc;
}

.slot-row {
  display: flex;
  gap: 12px;
  flex: 1;
}

.slot {
  flex: 1;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 8px;
  cursor: pointer;
  transition: all 0.2s;
}

.slot:hover {
  border-color: #667eea;
  background: rgba(102, 126, 234, 0.1);
}

.slot.selected {
  border-color: #667eea;
  box-shadow: 0 0 8px rgba(102, 126, 234, 0.3);
}

.slot-readonly {
  opacity: 0.7;
  cursor: default;
  border-color: rgba(255, 165, 0, 0.3);
  background: rgba(255, 165, 0, 0.05);
}

.slot-label {
  font-size: 11px;
  color: #aaa;
  display: block;
  margin-bottom: 6px;
}

.slot-frames {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.slot-frame-wrapper {
  position: relative;
  display: inline-block;
}

.slot-frame-thumb {
  width: 32px;
  height: 32px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  image-rendering: pixelated;
  background: #1a1a2e;
  display: block;
}

.slot-frame-remove {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 14px;
  height: 14px;
  line-height: 12px;
  text-align: center;
  font-size: 12px;
  font-weight: bold;
  color: #fff;
  background: #ef476f;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s;
  padding: 0;
  z-index: 1;
}

.slot-frame-wrapper:hover .slot-frame-remove {
  opacity: 1;
}

/* 导出区 */
.export-section {
  background: rgba(30, 41, 59, 0.8);
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 16px;
}

.export-section h3 {
  font-size: 14px;
  margin-bottom: 12px;
  color: #667eea;
}

.export-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  padding: 8px 20px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s;
}

.btn-primary {
  background: #667eea;
  color: white;
}

.btn-primary:hover {
  background: #5a6fd6;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: #e0e0e0;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
}

.export-status {
  margin-top: 12px;
  font-size: 13px;
  color: #888;
}

.hidden {
  display: none !important;
}

/* 格子高亮样式 */
.cell-highlight {
  fill: rgba(102, 126, 234, 0.3);
  stroke: #667eea;
  stroke-width: 2;
}

.cell-assigned {
  fill: rgba(40, 167, 69, 0.3);
  stroke: #28a745;
  stroke-width: 2;
}